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%I #11 Apr 11 2018 03:02:41
%S 2,3,5,7,13,17,1,13,7,17,17,1,17,13,1,7,13,13,5,13,5,5,17,11,11,7,1,5,
%T 1,1,1,11,5,1,11,11,5,5,1,1,13,5,7,11,5,1,17
%N Exponents p of the Mersenne primes 2^p - 1 (see A000043) read mod 18.
%t Array[Mod[MersennePrimeExponent@ #, 18] &, 45] (* _Michael De Vlieger_, Apr 10 2018 *)
%Y Cf. A126043-A126059.
%K nonn,more
%O 1,1
%A _Artur Jasinski_, Dec 17 2006
%E a(45)-a(47) from _Ivan Panchenko_, Apr 09 2018
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